A queueing model for optimal control of partial buffer sharing in ATM
Computers and Operations Research
Queueing networks and Markov chains: modeling and performance evaluation with computer science applications
Dynamic buffer management scheme based on rate estimation in packet-switched networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Virtual Partitioning by Dynamic Priorities: Fair and Efficient Resource-Sharing by Several Services
IZS '96 Proceedings of the 1996 International Zurich Seminar on Digital Communications: Broadband Communications - Networks, Services, Applications, Future Directions
AMS '07 Proceedings of the First Asia International Conference on Modelling & Simulation
WCDMA for UMTS: HSPA Evolution and LTE
WCDMA for UMTS: HSPA Evolution and LTE
Wireless Personal Communications: An International Journal
Packet scheduler for mobile Internet services using high speed downlink packet access
IEEE Transactions on Wireless Communications
Overview of QoS options for HSDPA
IEEE Communications Magazine
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
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The requirement to provide multimedia services with QoS support in mobile networks has led to standardization and deployment of high speed data access technologies such as the High Speed Downlink Packet Access (HSDPA) system. HSDPA improves downlink packet data and multimedia services support in WCDMA-based cellular networks. As is the trend in emerging wireless access technologies, HSDPA supports end-user multi-class sessions comprising parallel flows with diverse Quality of Service (QoS) requirements, such as real-time (RT) voice or video streaming concurrent with non real-time (NRT) data service being transmitted to the same user, with differentiated queuing at the radio link interface. Hence, in this paper we present and evaluate novel radio link buffer management schemes for QoS control of multimedia traffic comprising concurrent RT and NRT flows in the same HSDPA end-user session. The new buffer management schemes--Enhanced Time Space Priority (E-TSP) and Dynamic Time Space Priority (D-TSP)--are designed to improve radio link and network resource utilization as well as optimize end-to-end QoS performance of both RT and NRT flows in the end-user session. Both schemes are based on a Time-Space Priority (TSP) queuing system, which provides joint delay and loss differentiation between the flows by queuing (partially) loss tolerant RT flow packets for higher transmission priority but with restricted access to the buffer space, whilst allowing unlimited access to the buffer space for delay-tolerant NRT flow but with queuing for lower transmission priority. Experiments by means of extensive system-level HSDPA simulations demonstrates that with the proposed TSP-based radio link buffer management schemes, significant end-to-end QoS performance gains accrue to end-user traffic with simultaneous RT and NRT flows, in addition to improved resource utilization in the radio access network.